Damping particles can be used to attenuate vibrations in mechanisms. However, damping particles and mechanical parts interact in an extremely complex manner, which affects the energy dissipation of the mechanisms. This study proposes two-way coupled models based on Multi-Body Dynamics (MBD) and Discrete Element Method (DEM) to solve granule-structure interaction problems, and uses two sets of experiments to validate the numerical model. Subsequently, the validated coupled MBD–DEM model was used to further investigate the effects of cavity size and chamber number of particle dampers on the dynamic characteristics of mechanisms. Results show that the coupled MBD–DEM simulations reasonably agree with the corresponding experiments. In the mechanism with a particle damper, under the same mass but with different cavity sizes, the effect of vibration reduction follows the sequence: 1/4 box>1/8 box>1/16 box. Under the same mass but with different chamber numbers, the degree of damping follows the sequence: single-chamber box>double-chamber box>triple-chamber box. Adding damping particles to mechanisms does not affect the vibration period, but does reduce the acceleration amplitude.

阻尼颗粒可用于减弱机构中的振动。但是，阻尼颗粒和机械零件的相互作用极其复杂，这会影响机械装置的能量耗散。本研究提出了基于多体动力学（MBD）和离散元方法（DEM）的双向耦合模型，以解决颗粒与结构之间的相互作用问题，并使用两组实验验证了数值模型。随后，使用经过验证的MBD-DEM耦合模型进一步研究了腔室尺寸和颗粒阻尼器的腔数对机构动力学特性的影响。结果表明，耦合的MBD–DEM模拟与相应的实验相当吻合。在带有颗粒阻尼器的机构中，在相同质量但腔尺寸不同的情况下，减振效果的顺序为：1/4盒> 1/8盒> 1/16盒。在相同质量但腔数不同的情况下，阻尼程度遵循以下顺序：单腔盒>双腔盒>三腔盒。在机构中添加阻尼颗粒不会影响振动周期，但会减小加速度振幅。